2170843
Questão 1
Questão
Which end of a H2O molecule has a slight negative charge?
Responda
-
Oxygen end
-
Hydrogen end
Questão 2
Questão
What kind of bond is formed when two water molecules are within close contact of one another?
Responda
-
Ester
-
Phosphodiester
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Hydrogen
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Glycosidic
Questão 3
Questão
Cohesion is the sticking together of water molecules. It is not strong as the hydrogen bonds are very weak.
Responda
- True
- False
Questão 4
Questão
Water attracts polar molecules.
Responda
- True
- False
Questão 5
Questão
Water has....
Responda
-
A low specific heat capacity
-
A high latent heat of vaporisation
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A high surface tension
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A maximum density at 6 degrees
-
Hydrogen bonds
Questão 6
Questão
Hydrogen bonds are formed when two water molecules are close together and their opposite charges attract each other. This weak attraction forms the hydrogen bond between the neighbouring molecules.
Responda
- True
- False
Questão 7
Questão
At what temperature does water reach its maximum density?
Responda
-
1 degrees
-
3 degrees
-
4 degrees
-
5 degrees
-
6 degrees
-
8 degrees
Questão 8
Questão
Which of the following are examples of where water is important in transport.
Responda
-
In the phloem
-
In the transpiration stream
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During active transport
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In blood
-
During digestion
Questão 9
Questão
Surface tension allowed the surface film of the standing water to support aquatic insects.
Responda
- True
- False
Questão 10
Questão
A small amount of heat energy is required for a rise in the temperature of water.
Responda
- True
- False
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